"Among Thieves" by Poul Anderson
After centuries of fighting the barbaric semi-human Kolresh, the people of Norstad must make a choice: continue the war, or turn their attentions inward, toward Earth.

"Second Variety" by Philip K. Dick
Their country blasted by nuclear war, the moon-based US government falls back on killer robots to continue the war against Russia. But can robots be made TOO efficient?